Disconnecting switch



Nov. 16, 1926. 1,606,751

H. J. CRABBS DISCONNECTING SWITCH Filed Nov. 2, 192] 4 Sheets-Sheet 1WITNESSES: INVENTOR 6g, @J Wax/g fierberfi O'dbb;

M BY

ATTORNEY Nov. 16 1926. 1,606,751

H. J. CRABBS DISCONNECTING SWITCH Filed Nov. 2, 1921 4 Sheets-Sheet 2 311'7 WITNESSES: INVENTOR v ATTORNEY Nov 16 1926. 1,606,751

H.J.CRABBS DISCONNECTING SWITCH Filed Nov. 2, 1921 4 Sheets-Sheet 5ATTORNEY Nov. 16 1926. 15%,?512

H. J. CRABBS DISCONNEGTING SWITCH Filed Nov. 2, 1921 4 Sheets-She-et 4.

WITNESSES: 'NVENTOR ATTORNEY Patented Nov. 16, 1926.

UNITED STATES rarsnr Fries.

HERBERT J. CRABBS, OF EPITTSBURGI-I, PENNSYLVANIA, ASEEIGNGR TOWESTINGHOUSE ELECTRIC & MANUFACTURING GOMPAIJY, A

CGEPGEATIGN OF PENNSYLVANIA.

DISCONNEOTING S'WITCH.

Application filed November 2, 1921.

brought into proper alinement therewith and inaccuracies of installationcompensated for.

Another object of my invention is to simplify the structure andoperation of disconnecting switches and to provide means for preventingdamage to the stationary contact members by reason of the impact of themovable contact member.

As shown in the accompanying drawing,

Figure 1 is a view, in side elevation, of a switch embodying myinvention;

Figs. 2 and 3 are fragmentary views taken respectively from theleft-hand side and the right-hand side of Fig. 1; 1

Figs. 4 and 5 are enlarged views in side elevation and bottom plan,respectively;

Fig. 6 is a view, partially in elevation and partially in section, ofone of the stationary contact members;

Figs. 7 and 8 are detail views of a supporting bracket for the jawmembers; 7

Figs. 9 and 10 are detail views of one of the contact-supporting blocks;

Fig. 11 is a plan view of another of the contact-supporting blocks; and

Figs. 12 and 13 are detail views of the bracket which I employ forsupporting the devices of Figs. 9 and 11.

My invention is shown as used in connection with a disconnecting switch14 that is employed to open and to close the circuit through a circuitbreaker 15 that may be of any desired type. The disconnectingswitch, asordinarily used, closes the circuit through terminals 16 and 16,bridging members 17 and 18, break jaw structure 19, breaker 15, break awstructure 20, bridging member 21 and terminal member 16. V

The bridging members 17 and 21 are supported from the under side of apanel 24, through insulating pillars 25 and 26. The insulating pillarsare provided, as shown more clearly in Fig. 4, with base'portions 27 and28, respectively, that serve as sup- Serial No. 512,180

ports for bracket members 29 and 30, respectively.

The bracket 29 serves both as a hinge jaw for the bridging member 21 andas a support for break jaw members 31 and 32, with which the ends of thebridging members 17 and 18 coact. The bracket members 30 serve as hingesupports for the bridging members 17 and 18 and'also support a break jaw35,

with which the end of the bridging member 21 co-operates, and theterminals 16 and'16 J are connected to the bracket members 30 and 29,respectively, and to the break jaws 35, 31 and 32, as shown more clearlyin Figsv 4 and 5. I

V In Figs. 7 and 8, I have shown the bracket 30 somewhat in detail, toillustrate more clearly the manner in which the bridging structures 17and 18 are pivotally supported thereon, holes 37 being provided for thereception of screws 38. (Fig. 5) for supporting the break jaws 35.

The bracket 29 is constructed similarly to the bracket 30 but provisionneed be made, of course, only for one bridging member to be pivotallysupported thereupon.

As shown in Figs. 4 and 5, the bridging members close the circuitdirectly across the terminal members 16 and 16, while, in the positionoccupied in Fig. 1, the current is directed through the circuit breaker15. The circuit breaker 15 is provided with two insulating pillars 39and 40, upon which break jaws 19 and 20 are mounted. But one break awmember 20 is required on the pillar 39, for cooperation with thebridging member 21, while two break-jaw members 19 are required upon theinsulating pillar 40 to co-operate with the two bridging members 17 and18.

The pillar 39 (Figs. 1 and e is provided 1 with a cap member 42, thatserves as a base upon which a bracket 43 is mounted, and the bracket 43,in turn, supports a block 44.

The bracket 43 is provided, at its lower side,

through which extends a pair of bolts 50. These bolts also extendthrough holes 51 of the bracket 43, and, when loosened, permit the block44 to be rotatably adjusted upon the bracket 43.

The block 44 is provided with an extended portion 53 that has openings54 through which bolts may extend to secure break jaws 55 and fingers 56thereto. A tapped hole 57 is also provided for the reception of a screw58, which assists in maintaining an arc shield 60 in place.

The break-jaw structure 19 is mounted for rotatable adjustment upon itsbracket 43 in the same manner as is the break-jaw structure 20, but, asshown in Figs. 9 and 10, thejaw-supporting block 61 is provided with,two arms 63 and 64, for supporting two sets of break jaws 55 and fingers56, so that the circuit from the terminal16 to the. breaker 15 may bebridged by either the bridging member 17' or the bridging member 18.

It will be seen that, by means of the arrangement illustrated, thecircuit through the breaker 15 may be either made or broken withoutinterruption of the main circuit across the terminals 16' and 16. WViththe parts in the position. shown in Figs. 4 and 5, the blade member 17,for instance, may be brought to the position shown in Fig. 1, and theblade member 21 then also brought to the position. occupied by it inFig. 1. The blade member 18. may then be lowered, and the current thusdiverted through the breaker 15 without interruption of the circuit. Incutting out the breaker 15, either of the blades 17 or 18 may be raisedto the position shown in: Fig. 4, and the other blades then also raised-The apparatus shown is employed in connection with exceedingly highvoltages and is necessarily quite heavy, so that it is some, timesdiflicult to place the oil-breaker tank in proper alinement with theoverhead switch structure. Such alinement is, of course, essential inorder that the. bridging members 17 18 and 21 will make properengagementv with the oil-breaker terminals By reason of my constructionof. mountings for the terminals 19 and 20, it is possible to easilybring such terminals into prop.- er alinement, with the bridgingmembers. If. it were found that the terminal 19 were not directly inposition under the pillar in a transverse direction, the bracket 43could be rotated slightly upon the base member 42, and the block 44could be ro-j tatably adjusted upon the bracket, 48, ei ther. to the.right or. to the left, as required.

This doublev adjustment. not, only provides.

for a range of adjustment, transversely to ri i g. m mb rs ut; a so. prmits. h break. jaws 55; to be brought int proper alinement with thepath ofmovementof'the bridging members. The terminal member 20 may bealso so adjusted.

The fingers 56 are preferably of spring steel and are curved outwardslightly at their free ends, so that, if a bridging. member should fallfrom its raised, position, its movement would be retarded by thefingers, and excessive shock to the supporting structure for the breakjaw members be avoided.

The bridging members are provided with latches 65, of any desired form,and sleet shields 60 and 66 also function in a manner common to devicesof'this character.

Various modifications may be made with out departing from the spirit andscope of the invention, as defined in the accompany-- ing claims. 1

What I claim as my invention is:

1 In an electric switch, the combination with a movable contact memberand a stationary cont-act member, of a rotatably adjustable support forthe stationary contact member, and means whereby the stationary contactmember may be rotatably adjusted upon the said support, the rotatableadjustments being made in approximately parallel planes.

2. In an electric switch, the combination with a movable contact member,of a stationary contact member, a base member, a

bracket member rotatably adjustable on the.

base member, and a stationary-contact-supporting member mounted forrotative movement eccentrically of the bracket.

In an electric switch, the combination with a movable contact member anda stationary contact member, of a base, a bracket rotatably supportedupon" the base and having a portion extending radially thereof,

and a; contact-supporting block rotatably adjustable upon the saidextended portion, the rotatablejadjustments beingmade in approximatelyparallel planes.

4. An adjustable contact member comprising a base. member, a bracketmember provided with a plurality of curved slots, clamping means passingthrough the slots in said bracket member and engaging said base member,a supporting member provided with a plurality of curved slots mounted onsaid bracket member, clamping means passing through the slots in saidsupporting member and engaging said bracket member, and a break jawmounted on said support ing member.

5. An adjustable contact member comprising a base member,abreak-jawmember, and an intermediate connecting means, said connecting meansbeing provided with means. whereby said break jaw is, capable of;rotatable adjustment about said base memberin a plurality or planesextending in approximately the direction of the long'itudinal axis of:the base member.

'- 6; In an electric switch device, the 001m bination of a supportingmember, a fixed contact, an adapter for supporting said fixed contactand means for securing said adapter to said member in various positionsof angular adjustment.

7. In an electric switch device, the combination of an inclinedsupporting member, awasher secured thereto, a fixed contact, an adapteradjustable on said Washer for supporting said fixed contact, and meansfor clamping said adapter to said Washer in adjusted position.

8. In an electric switch device, the combination of a supportinginsulator bushing, an annular member at the end thereof,

means for rigidly securing said member to said bushing, a fixed contact,an adapter for supporting said fixed contact in a-substantially verticalposition and means for clamping said adapter to said member in variouspositions of angular adjustment.

9. In an electric switch device, the combination of an insulatorbushing, an adapter carried thereby, a contact retainer and means foradjustably securin retainer to said adapter.

In testimony whereof, I have hereunto subscribed my name this 29th dayof October, 1921.

HERBERT J. CRABBS or said contact

